This is a specific tool for brake work. It's the SW-Stahl brake spanner, model 01405SB. It's a double-ended wrench with a 10mm opening on one end and an 11mm opening on the other – these are common sizes for brake components, especially on things like bicycles or some automotive applications. The wrench itself is about 180mm (just over 7 inches) long, giving you decent leverage, and it's 15mm thick. It's made from sturdy steel to handle the torque you might need. If you're doing brake repairs, maintenance, or assembly and you keep running into fittings or nuts that are 10mm or 11mm, having this dedicated spanner in your toolkit can make the job a lot easier than fumbling with adjustable wrenches. A simple, no-frills, professional-grade tool for a specific job.
